;; look under one of the level-2 headings, position the cursor on it and do C-c
;; C-z again. This exposes the level-2 body and its level-3 child subheadings
;; and narrows the buffer again. You can keep on zooming in on successive
;; look under one of the level-2 headings, position the cursor on it and do C-c
;; C-z again. This exposes the level-2 body and its level-3 child subheadings
;; and narrows the buffer again. You can keep on zooming in on successive